The Birth of Zeus (IMAGE) University of Pennsylvania Caption On the leftis Dan Diffendale, research assistant, Mt. Lykaion Excavation and Survey Project, in the ash altar of Zeus trench, at the discovery of a group of Mycenaean kylikes, circa 13th century BCE. Summer 2008. To the right is a small bronze hand of Zeus holding a silver lightning bolt (approximately 2 cm), circa 500 BCE, excavated at the ash altar of Zeus, Mt. Lykaion, Summer 2008. Credit University of Pennsylvania Museum of Archaeology and Anthropology Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.